The car started to idle at 6,000RPM’s when it was started and when put in gear it idled at 4000RPM’s. Last week our mechanic changed the idle air sensor valve and it was ok for a few days. Now the car idles at 6000RPM’s and will not go faster than 25mph. The Check Transmission light on the dash is on and the fluid in the transmission checks ok. He say’s the transmission went into emergency mode and the cost to repair it will be in the thousands of dollars. Any suggestions?

One Response to “2005 Mercury Sable V6 Automatic”

These are the exact symptoms of a vacuum leak. Nothing to do with the transmission. The vacuum leak will need to be repaired before the computer can be reset and taking out of what your mechanic is calling emergency mode.

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